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 Post subject: Boards for grading #6
PostPosted: Mon Aug 26, 2019 8:44 pm 

Joined: Thu Aug 01, 2019 6:55 pm
Posts: 327
The top 4 pictures are from a telephone system, and the bottom 3 are random. At least one of the boards came out of another telephone system in the bottom 3. All help is appreciated. Sorry, forgot to flip the big board in the second and third picture.

Thank you!


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PostPosted: Fri Aug 30, 2019 1:27 pm 
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Pic 1 & 2:

Midgrade

Pic 2 & 3:

Top left board is midgrade.
Bottom board is Peripheral.
Top right board (red colored) we do not buy, it appears that it may have Mercury Wetted Relays. They are the small silver colored rectangled boxes (they look like miniature loafs of bread). There are at least two on that board, one of them is directly in the center of the board. Do not remove them if they are in fact those, they are highly toxic.


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PostPosted: Fri Aug 30, 2019 1:42 pm 
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Pic 5 midgrade. I’d suggest not sending it, and instead carefully cracking the cover off the switch. Occasionally they have gold plated balls in the dip switches.


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PostPosted: Fri Aug 30, 2019 1:44 pm 
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Last set
Large boards are low telco.
Large finger with pins, peripheral,

Two small fingers? No clue. My guess is gold pins connector but I usually trim the finger gold here and put them in with jewellery scrap, which goes elsewhere.
Remaining 2 brown is midgrade and the other peripheral


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PostPosted: Sat Aug 31, 2019 11:03 am 

Joined: Thu Aug 01, 2019 6:55 pm
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Thank you Boardsort and Lost for helping grade my boards. What do plastic IC chips with gold legs go as?

Thank you.


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PostPosted: Sat Aug 31, 2019 12:10 pm 
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I’d need a pic to tell you
For ICs usually green/brown fibre, but not every plastic package with gold pins is an IC. And some non IC packages go as IC, like laser mouse diodes, where others are peripheral (like led mouse diodes).


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PostPosted: Sat Aug 31, 2019 6:26 pm 

Joined: Thu Aug 01, 2019 6:55 pm
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On the board that Boardsort said they would not take I seem to remember some of the chips having gold legs but I will double check. Do the white IC looking things go as IC chips?

Thank you!


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PostPosted: Sat Aug 31, 2019 8:28 pm 
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On the red western board? I doubt there’s anything with gold plated pins. Probably a nickel-copper-tin brass: if you see gold colour. Commonly found when lead solder is used.
The white ‘boards’ are midgrade. That’s an old design for an electrical package. Before the technology to condense it into a small sealed package was available.
I wouldn’t mess with that board at all. Just take it to whatever local hazmat drop off service is available to you. You don’t want to mess with lead solder. Those white boards are fragile. And extremely sharp when they break. I’ve done a fair bit of damage to my fingers and hands over the years with those.

Add the other previously mentioned issue of mercury and... let this one go. Really, it’s not worth your health and well-being!
I find similar components in very early magnetic tape systems like Betachord and V-6. It’s a place where even I say no to repair or salvage.


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PostPosted: Sun Sep 01, 2019 9:52 am 

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Will do.

Thank you.


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PostPosted: Fri Sep 06, 2019 2:38 am 

Joined: Tue Mar 26, 2019 3:21 pm
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Here is a better picture of the 'miniature loaf of bread' mercury wetted relay for those interested. I have not seen reference to these previously on the forum. The two chips behind the mercury wetted relay are the ones with the gold appearing pins.


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